News.

A psychoactive substance formerly classified as a legal high, Spice is designed to mimic the effects of cannabis. Users are sometimes referred to as "zombies", and photos of people under the influence are often shared widely on social media.

The council tweeted: "Spice can be distressing for both the user and members of the public.

"Please be compassionate by not taking photos."

Substance abuse charity Addaction commended Sheffield's "humane" request and said that people who take spice are "unwell".

A spokesman said: "Compassion for people whose lives have taken a wrong turn is really important.

"Sheffield City Council are taking a humane and sensible approach; we commend them for it.